Thermoclines in the Park [Free Verse]

Running through the park,
in the light of the rising sun,
I pass through a band of cool air,
and a little later,
pass through a band
of warm, humid air.

And, I wonder whether 
I'm having a stroke.

Isn't physics supposed 
to push the warm air over
into the cold,
or pull the cold air over
into the warm,
or both, 
and to keep doing so until
the air temperature
is an undifferentiated mass?

Had I stumbled into a
glitch in the Matrix?
Was the simulated weather 
breaking down?

Why was thermodynamics
I had so many questions,
but so few answers.

And so many miles to go.